CVE-2021-39356: Content Staging Project Content Staging

Medium severity, CVSS 4.8. EPSS: 1% chance of exploitation in the next 30 days.

The Content Staging WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and escaping via several parameters that are echo'd out via the ~/templates/settings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 2.0.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

Affected products

• Content Staging Project Content Staging: up to and including 2.0.1

Published 2021-10-21. Last modified 2026-06-17.